(A) General prohibitions. No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other national, state, or local pretreatment standards or requirements.
(B) Except as herein provided, no person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewer:
(1) Any wastewater having a temperature which will inhibit biological activity in the city's wastewater treatment plant resulting in interference, but in no case, wastewater with a temperature at the introduction into the POTW which exceeds 40°C (104°F).
(2) Any water or waste which may contain more than 100 parts per million, by weight, of domestic fats and greases.
(3) Any waste that is not substantially free of floating or non-soluble oils including petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause pass through or interference. No industrial oil bearing waste containing more than 100 mg/l by weight as measured by the analytical and sampling methods used that conform to the approved current methodology as prescribed in 40 CFR Part 136 - Guidelines For Establishing Test Procedures For The Analysis Of Pollutants and amendments thereto.
(4) Any liquids, solids, or gasses which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction to cause fire or explosion or be injurious in any other way to the operation of the wastewater treatment plant. This includes but is not limited to gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas. And in no case, pollutants with a closed cup flashpoint of less than 140°F (60°C) or pollutants which cause an exceedence of 10% of the lower explosive limit (LEL) at any point within the POTW. Using test methods specified in 40 CFR 261.21.
(5) Any garbage that has not been properly shredded.
(6) Any ashes, cinders, sand, mud, straw, shavings, metal, glass rags, feathers, tar, plastics, wood, paunch manure, hair and fleshings, entrails, chemical residues, cannery wastes, bulk solids, or any other solid or viscous substance capable of causing obstruction to the flow in the sewers or other interference with the proper operation of the wastewater treatment plant.
(7) Any waters or wastes having a pH lower than 5.5 or higher than 11.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment, or any personnel of the sewage works.
(8) Any pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health and safety problems.
(9) Any waters or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials at the wastewater treatment plant.
(10) Any noxious or malodorous liquids, gases, or solids which either alone or by interaction are capable of creating a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for their maintenance or repair.
(11) Any wastewater containing any radioactive wastes or isotopes except in compliance with state or federal regulations.
(12) Any pollutant, including oxygen demanding pollutants (BOD, etc.) released in a discharge at a flow rate and/or pollutant concentration which will cause interference with the POTW.
(13) Any substance with objectionable color not removed in the treatment process, such as dye wastes and vegetable tanning solutions.
(14) Any water or wastes containing polychlorinated biphenyls (PCBs).
(15) Any trucked or hauled pollutants except at discharge points designated by the control authority in accordance with § 51.017.
(16) Any RCRA listed hazardous wastes.
(C) National Categorical Pretreatment Standards. Users must comply with the categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405 - 471.
(D) The control authority is authorized to establish Local Limits pursuant to 40 CFR 403.5(c). The following pollutant limits are established by city utilities to protect against pass through and interference. No user shall discharge wastewater containing concentrations in excess of the following daily maximum limits.
Constituent | Concentration (mg/l)
|
Constituent | Concentration (mg/l)
|
Arsenic | 0.2 |
Cadmium | 0.2 |
Chromium - total | 2.0 |
Chromium - hexavalent | 2.0 |
Copper | 0.7 |
Iron | 15 |
Lead | 1.0 |
Mercury | 0.004 |
Nickel | 2.0 |
Silver | 2.0 |
Zinc | 4.0 |
Cyanide | 1.0 |
Phenols | 25.0 |
The above limits apply at the point where the wastewater is discharged to the POTW. The control authority may impose mass limitations on dischargers if it is believed that dilution is being used to meet the pretreatment standards or requirements of this chapter. These standards do not override the other, more stringent standards established by federal or state agencies or departments. The control authority will enforce applicable federal, state, and local standards and regulations. A discharger of industrial wastewater shall meet the most stringent applicable standard in all cases.
(E) If city utilities determines that any user of the services of the sewage system of the city is not complying with all the requirements of all applicable local, county, state, and federal laws including but not limited to Clean Water Act, as amended, notice shall be given in writing to such user or the authorized representative of such user of such failure, which notice shall require such user to forthwith comply with said requirements, all subject to the right of appeal which is herein provided for.
(Ord. 6386, passed 3-20-17) Penalty, see § 51.999